function top ( id, value ) {
	document.getElementById(id).style.top = value + "px";
}

function left ( id, value ) {
	document.getElementById(id).style.left = value + "px";
}

function right ( id, value ) {
	document.getElementById(id).style.right = value + "px";
}

function bottom ( id, value ) {
	document.getElementById(id).style.bottom = value + "px";
}

function show( id ) {
	document.getElementById(id).style.visibility = "visible";
}

function hide( id ) {
	document.getElementById(id).style.visibility = "hidden";
}